JP4476425B2 - Superconducting coil device - Google Patents

Superconducting coil device Download PDF

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Publication number
JP4476425B2
JP4476425B2 JP2000108540A JP2000108540A JP4476425B2 JP 4476425 B2 JP4476425 B2 JP 4476425B2 JP 2000108540 A JP2000108540 A JP 2000108540A JP 2000108540 A JP2000108540 A JP 2000108540A JP 4476425 B2 JP4476425 B2 JP 4476425B2
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Japan
Prior art keywords
superconducting
superconducting wire
coil device
fixing
wire
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JP2000108540A
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JP2001291611A (en
Inventor
芳久 高橋
武 大熊
礼文 佐藤
えり子 米田
守 嶋田
勝政 荒岡
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Toshiba Corp
Tokyo Electric Power Co Inc
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Toshiba Corp
Tokyo Electric Power Co Inc
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Description

【０００１】
【発明の属する技術分野】
本発明は、テープ状の超電導線材を巻回してコイルに形成する際、引張り強度を高めた超電導コイル装置に関する。
【０００２】
【従来の技術】
一般に、超電導コイル装置は、金属系超電導線材であれ、酸化物超電導線材であれ、その線材をコイル状に巻回する場合、巻き始めと巻き終りに、例えば銅板等の常電導金属に接続する、いわゆる電極部を備えている。この電極部を通じて超電導コイル装置には、電源から電流が供給されるようになっている。
【０００３】
この超電導コイル装置は、変圧器、限流器等の静止形電力機器のコイル用として多く適用されているが、コイルを作製するにあたって図１２に示す手順が採られていた。
【０００４】
超電導コイル装置は、例えば銅板製の電極部１にテープ状の超電導線材２を半田付した後、その超電導線材２に張力を加えながら円筒状の巻枠３の周方向に沿ってソレノイド状に巻回し、コイルを作製していた。
【０００５】
【発明が解決しようとする課題】
図１２で示した超電導線材２の巻回手順を採る従来の超電導コイル装置では、いくつかの不具合、不都合な問題点があった。
【０００６】
超電導コイル装置は、超電導線材２を巻枠３の周方向に沿って巻回し、コイルを作製するにあたり、当初、電極部１に半田付を施工してから超電導線材２を巻回するため、巻き始めの部分にほとんど張力が働いていないかあるいは張力が過度に働きすぎている等張力に過不足が生じていた。このため、コイルには、長年の使用の結果、変形または亀裂等の機械的劣化を生じさせることがあった。
【０００７】
また、超電導線材２の巻き始めの部分に張力の過不足が生じていると、超電導コイル装置は、例えば臨界電流やｎ値（電流・電圧の立ち上り傾斜等）の指標が低くなり、性能劣化を引き起す要因にもなっていた。
【０００８】
このように、従来の超電導コイル装置には、いくつかの問題点があり、長年使用していても品質の保証をより長く維持させる新たなコイルの実現が望まれていた。
【０００９】
本発明は、このような事情に基づいてなされたもので、超電導線材を巻回してコイルを作製するにあたり、超電導線材に張力を加えながら電極部に半田付けを施工して超電導線材に過不足なく均一に引張り応力を与え、長年実施していても良好な品質を長く維持させる超電導コイル装置を提供することを目的とする。
【００１０】
【課題を解決するための手段】
本発明に係る超電導コイル装置は、上記目的を達成するために、請求項１に記載したように、巻枠の周方向に沿って巻回させた超電導線材と、この超電導線材に固着させた電極部とを備えた超電導コイル装置において、上記超電導線材は、上記巻枠に設けた固定板に固着手段で固着させるとともに、上記電極部に固着手段で固着させる際、張力を加えながら固着させた後、上記固定板から上記電極部までを切断し、さらに上記固定板を上記巻枠から取り除いたものである。
【００１２】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項２に記載したように、電極部に超電導線材を固着させる固着手段は、半田であることを特徴とするものである。
【００１３】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項３に記載したように、固定板に超電導線材を固着させる固着手段は、半田およびエポキシ接着剤のうち、いずれか一方であることを特徴とするものである。
【００１４】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項４に記載したように、超電導線材は、複数本の超電導線材を半田部で固着させて巻枠の周方向に沿って巻回させたものである。
【００１５】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項５に記載したように、超電導線材は、絶縁被覆を施工していないことを特徴とするものである。
【００１６】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項６に記載したように、超電導線材は、絶縁被覆を施工するとともに、電極部に固着させる部分を絶縁被覆の撚り線から剥し、丸線として電極部に固着させたものである。
【００１７】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項７に記載したように、超電導線材は、巻枠の周方向に沿って巻回させる際、パンケーキ状に形成したものである。
【００１８】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項８に記載したように、超電導線材は、巻枠の周方向に沿って巻回させる際、パンケーキ状に形成するとともに、パンケーキ状のものを軸方向に配置組み合わせてコイルとしたものである。
【００１９】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項９に記載したように、巻枠の周方向に沿って巻回させた超電導線材と、この超電導線材に固着させた電極部とを備えた超電導コイル装置において、上記超電導線材を上記巻枠に設けた固定板に固着手段で固着させるとともに、上記電極部に固着手段で固着させる際、張力を加えながら固着させた後、上記固定板から上記電極部までの上記超電導線材を切断し、さらに上記固定板を上記巻枠から取り除いて形成した第１コイルと、上記別の超電導線材を上記別の巻枠に設けた別の固定板に固着手段で固着させるとともに、上記別の電極部に固着手段で固着させる際、張力を加えながら固着させた後、上記別の固定板から上記別の電極部までの上記別の超電導線材を切断し、さらに上記別の固定板を上記別の巻枠から取り除いて形成した第２コイルと、上記第１コイルの電極部と上記第２コイルの電極部とを連結部で接続させたものである。
【００２０】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項１０に記載したように、超電導線材を巻回させる巻枠は、周方向に沿って設けた突き出し部で区画した溝部を備えたものである。
【００２１】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項１１に記載したように、第１コイルおよび第２コイルは、ともに超電導線材を巻枠の周方向に沿って巻回させる際、時計方向および反時計方向のうち、いずれか一方を選択したことを特徴とするものである。
【００２２】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項１２に記載したように、請求項１に記載の超電導線材を変圧器の一次巻線に適用するとともに、請求項９に記載の超電導線材を変圧器の二次巻線に適用したものである。
【００２３】
また、本発明に係る超電導コイル装置は、上記目的を達成するために、請求項１３に記載したように、請求項１に記載の超電導線材を直径の異なる複数個組み合わせてコイルを作製し、限流器および永久電流スイッチのいずれかに適用したものである。
【００２４】
【発明の実施の形態】
以下、本発明に係る超電導コイル装置の実施形態を図面および図面に付した符号を引用して説明する。
【００２５】
図１は、本発明に係る超電導コイル装置の第１実施形態を説明するために用いた概念図である。なお、図１中、（ａ）は巻枠に対し、超電導線材の仮りの巻回始期を説明するために用いた概念図であり、（ｂ）は巻枠に対し、超電導線材の仮りの巻回中間期を説明するために用いた概念図であり、（ｃ）は巻枠に対し、超電導線材の実際の巻回始期を説明するために用いた概念図である。
【００２６】
また、本発明に係る超電導コイル装置に適用する超電導線材は、絶縁被覆を施工していないビスマス系、具体的には（ＢｉＰｂ）２Ｓｒ２Ｃａ２Ｃｕ３Ｏｙ（Ｂｉ２２２３）のＡｇシーステープで、幅３．８ｍｍ、厚み０．２５ｍｍである。
【００２７】
本実施形態に係る超電導コイル装置は、コイルを作製するにあたり、図１（ａ）に示すように、先ず、筒状の巻枠１０に設けた銅板製の固定板１１にＡｇシースＢｉ２２２３の超電導線材１２の端部を半田部１３で固着させるとともに、超電導線材１２の中間部分が予め電極部１４に当接することを予想した位置に半田位置決め部１５を付し、矢印ＣＷで示す時計方向に向って１０ＭＰａの引張り応力で超電導線材１２を巻枠１０の周方向に沿って巻回させる。
【００２８】
次に、超電導線材１２の半田位置決め部１５が図１（ｂ）に示すように、電極部１４に当接すると、本実施形態は超電導線材１２に張力を加えたまま電極部１４に半田部１３で固着させた後、図１（ｃ）に示すように、固定板１１から電極部１４までの間の超電導線材１２を切断するとともに、固定板１１を取り除き、電極部１４に固着させた超電導線材１２に初期応力を与える。
【００２９】
巻回による張力と半田部１３の固着力に基づく初期応力が与えられた超電導線材１２は、図１（ｃ）に示すように、実質上の巻回始期を開始し、巻枠１０に対し、矢印ＣＷで示す時計方向に向って巻回させてコイルを作製する。
【００３０】
このように、本実施形態は、超電導線材１２の巻回開始時、固定板１１や電極部１４に半田部１３で溶着させて超電導線材１２に予め初期応力を与えた後、電極部１４の手前側から切断して実質上の巻回開始時期とし、超電導線材１２の電極部１４に対する巻回開始部分に局所的に断線がなく均一な応力を加えたので、長年実施していても臨界電流を高く維持させることと相まってｎ値も高く維持させた高品質のコイルを保証することができる。
【００３１】
なお、本実施形態は、コイルを液体窒素の中に浸漬冷却し、通電したところ、臨界電流、ｎ値ともに好成績の実験結果が認められた。
【００３２】
図２は、本発明に係る超電導コイル装置の第２実施形態を説明するために用いた概念図である。なお、第１実施形態の構成部分と同一部分には同一符号を付す。
【００３３】
本発明に係る超電導コイル装置に適用する超電導線材は、絶縁被覆を施工していないビスマス系、具体的にはＢｉ２Ｓｒ２ＣａＣｕ２Ｏｙ（Ｂｉ２２１２）のＡｇシーステープで、幅３．８ｍｍ、厚み０．２５ｍｍである。
【００３４】
本実施形態は、まず、筒状の巻枠１０にＡｇシースＢｉ２２１２の超電導線材１２の端部を約２ｃｍに亘ってエポキシ接着剤１６で固着させるとともに、超電導線材１２の中間部分が予め電極部１４に当接することを予想した位置に半田位置決め部１５を付し、矢印ＣＷで示す時計方向に向って５ＭＰａの引張り応力で超電導線材１２を巻枠１０の周方向に沿って巻回させる。
【００３５】
次に、超電導線材１２の半田位置決め部１５が電極部１４に当接すると、本実施形態は、超電導線材１２に張力を加えたまま電極部１４に半田部１３で固着させた後、巻枠１０の周方向に沿って超電導線材１２を巻回させ、コイルを作製する。
【００３６】
このように、本実施形態は、超電導線材１２を電極部１４に半田部１３で固着させる際、超電導線材１２の端部をエポキシ接着剤１６で固着させ、超電導線材１２の電極部１４の当接する位置に予め適正な初期応力を与えたので、臨界電流やｎ値を高く維持させた高品質のコイルを保証することができる。
【００３７】
なお、本実施形態は、コイルを液体窒素の中に浸漬冷却し、通電したところ、臨界流、ｎ値ともに好成績の実験結果が認められた。
【００３８】
図３は、本発明に係る超電導コイル装置の第３実施形態を説明するために用いた概念図である。なお、第１実施形態の構成部分と同一部分には同一符号を付す。
【００３９】
本発明に係る超電導コイル装置に適用する超電導線材は、絶縁被覆を施工していないイットリウム系、具体的にはＹＢａ２Ｃｕ３Ｏｙ（Ｙ１２３）／ＸＹＺのハステロイ基板テープで、幅１０ｍｍ、厚み０．１ｍｍである。
【００４０】
本実施形態は、まず、筒状の巻枠１０に設けた銅板製の固定板１１にハステロ基板テープの第１超電導線材１２ａと第２超電導線材１２ｂとを２枚重ねにして半田部１３で固着させるとともに、第１超電導線材１２ａの中間部分が予め電極部１４に当接することを予想した位置に半田位置決め部１５を付し、矢印ＣＷで示す時計方向に向って１ＭＰａの引張り応力で第１超電導線材１２ａおよび第２超電導線材１２ｂを巻枠１０の周方向に沿って巻回させる。なお、第１超電導線材１２ａと第２超電導線材１２ｂとは、互いに半田部１３で固着される。
【００４１】
次に、第１超電導線材１２ａの半田位置決め部１５が電極部１４に当接すると、本実施形態は、半田部１３で固着させた２枚重ねの第１超電導線材１２ａと第２超電導線材１２ｂとに張力を加えたまま第１超電導線材１２ａを電極部１４に半田部１３で固着させた後、巻枠１０の周方向に沿って第１超電導線材１２ａおよび第２超電導線材１２ｂを巻回させ、コイルを作製する。
【００４２】
このように、本実施形態は、半田部１３で互いに固着させた第１超電導線材１２ａおよび第２超電導線材１２ｂを電極部１４に半田部１３で固着させる際、２枚重ねの第１超電導線材１２ａおよび第２超電導線材１２ｂのそれぞれの端部を固定板１１で固着させ、第１超電導線材１２ａおよび第２超電導線材１２ｂのそれぞれの電極部１４の当接する位置に予め適正な初期応力を与えたので、臨界電流やｎ値を高く維持させた高品質のコイルを保証することができる。また、本実施形態の場合、大電流用に有効である。
【００４３】
図４は、本発明に係る超電導コイル装置の第４実施形態を説明するために用いた概念図である。なお、第１実施形態の構成部分と同一部分には同一符号を付す。
【００４４】
本発明に係る超電導コイル装置に適用する超電導線材は、線径０．１ｍｍのＣｕＮｉ／ＣｕマトリックスのＮｂＴｉ系の線材を３本撚り合わせ絶縁被覆したものである。
【００４５】
本実施形態は、まず、超電導線材１２をその端部から数十ｃｍの長さに亘って絶縁被覆を剥し、丸線材１７ａ，１７ｂ，１７ｃとして巻枠１０に設けた固定板１１に半田部１３で固着させる。また、丸線材１７ａ，１７ｂ，１７ｃは、その中間部分に予め電極部１４が当接することを予想した位置に半田位置決め部１５を付し、矢印ＣＣＷで示す反時計方向に向って１ＭＰａの引張り応力で巻枠１０の周方向に沿って巻回させる。
【００４６】
次に、丸線材１７ａ，１７ｂ，１７ｃの半田位置決め部１５が電極部１４に当接すると、本実施形態は、丸線材１７ａ，１７ｂ，１７ｃに引張り張力を加えたまま丸線材１７ａ，１７ｂ，１７ｃを電極部１４に半田部１３で固着させた後、巻枠の周方向に沿って超電導線材１２を巻回させ、コイルを作製する。
【００４７】
このように、本実施形態は３本の線材を撚り合わせて絶縁被覆した超電導線材１２のうち、丸線材１７ａ，１７ｂ，１７ｃのそれぞれの端部を固定板１１に半田部１３で固着させ、丸線材１７ａ，１７ｂ，１７ｃのそれぞれの電極部１４の当接する位置に予め適正な初期応力を与えたので、臨界電流やｎ値を高く維持させた高品質のコイルを保証することができる。
【００４８】
図５は、本発明に係る超電導コイル装置の第５実施形態を説明するために用いた概念図である。なお、第１実施形態の構成部分と同一部分には同一符号を付す。また、図５中、（ａ）は巻枠に対し、超電導線材の仮りの巻回始期を説明するために用いた第１コイルの概念図であり、（ｂ）は巻枠に対し、超電導線材の仮りの巻回始期を説明するために用いた第２コイルの概念図であり、（ｃ）は第１コイルと第２コイルとを同心的に配置して組み合わせたことを説明するために用いた概念図である。
【００４９】
本発明に係る超電導コイル装置は、直径約２０ｃｍの第１コイル１８ａと、直径約２１．４ｃｍの第２コイル１８ｂとを組み合わせて構成される。
【００５０】
第１コイル１８ａは、図５（ａ）に示すように、筒状の巻枠１０に設けた銅板製の固定板１１に超電導線材１２の端部を半田部１３で固着させるとともに、超電導線材１２の中間部分が予め電極部１４に当接することを予想した位置に半田位置決め部１５を付し、矢印ＣＣＷで示す反時計方向に向って張力を加えながら超電導線材１２を巻枠１０の周方向に沿って巻回させる。
【００５１】
次に、超電導線材１２の半田位置決め部１５が電極１４に当接すると、本実施形態は、第１実施形態と同様に、超電導線材１２に張力を加えたまま電極部１４に半田部１３で固着させた後、固定板１１から電極部１４までの間の超電導線材１２を切断するとともに、固定板１１を取り除き、電極部１４に固着させた超電導線材１２に初期応力を与える。
【００５２】
初期応力が与えられた超電導線材１２は、再び巻枠１０の周方向に沿い、矢印ＣＣＷで示す反時計方向に向って巻回させた後、ソレノイドの第１コイル１８ａを作製する。
【００５３】
一方、第２コイル１８ｂは、図５（ｂ）に示すように、円筒状の巻枠１０に設けた銅板製の固定板１１に超電導線材１２の端部を半田部１３で固着させた後、第１コイル１８ａの作製手順と同様に、超電導線材１２を電極部１４に半田部１３で固着させる際、初期応力を与えてから切断し、切断後の超電導線材１２を矢印ＣＷで示す時計方向に向って巻回させた後、ソレノイドの第２コイル１８ｂを作製する。
【００５４】
このようにして作製された第１コイル１８ａおよび第２コイル１８ｂは、図５（ｃ）に示すように、同心状に配置し、電極部１４，１４を例えば銅板等の連結部１９で接続させる。
【００５５】
本実施形態は、第１コイル１８ａと第２コイル１８ｂとを組み合わせて超電導コイル装置を作製する際、第１コイル１８ａの超電導線材１２を巻枠１０に対し、反時計方向に向って巻回するとともに、第２コイル１８ｂの超電導線材１２を巻枠１０に対し、時計方向に向って巻回し、各コイル１８ａ，１８ｂの電極部１４，１４を連結部１９で接続させる一方、各コイル１８ａ，１８ｂの電極部１４，１４に超電導線材１２，１２を固着させる際、張力を加えながら超電導線材１２，１２の端部に予め適正な初期応力を与えたので、臨界電流やｎ値を高く維持させた高品質のコイルを保証することができる。
【００５６】
図６は、本発明に係る超電導コイル装置の第６実施形態を説明するために用いた概念図である。なお、第１実施形態の構成部分と同一部分には同一符号を付す。
【００５７】
本発明に係る超電導コイル装置に適用する超電導線材は、第１実施形態と同様に、絶縁被覆を施工していないビスマス系、具体的には（ＢｉＰｂ）２Ｓｒ２Ｃａ２Ｃｕ３Ｏｙ（Ｂｉ２２２３）のＡｇＭｎシーステープで、幅３．８ｍｍ、厚み０．２５ｍｍである。
【００５８】
本実施形態に係る超電導コイル装置は、図６に示すように、筒状の巻枠１０に対し、ＡｇシースＢｉ２２２３の超電導線材１２の端部を絶縁テープ２０で固定するとともに、超電導線材１２の中間部分が予め電極部１４に当接することを見越した位置に半田位置決め部１５を付し、矢印ＣＣＷで示した反時計方向に向って１０ＭＰａの引張応力で超電導線材１２を巻枠１０の周方向に沿って巻回させ、電極部１４で超電導線材１２を半田部１３により固着させた後、再び矢印ＣＣＷで示した反時計方向に向って巻回させ、パンケーキ状の単位コイル２１が作製される。
【００５９】
パンケーキ状に作製した単位コイル２１は、図７に示すように、電極部１４の軸方向に沿って配置・組み合わせて一つのユニットコイル２２が作製される。
【００６０】
このように、本実施形態は、パンケーキ状の単位コイル２１を電極部１４の軸方向に沿って配置・組み合わせて一つのユニットコイル２２を作製するにあたり、単位コイル２１毎に超電導線材１２を電極部１４に固着させる際、引張り張力を加えながら予め適正な初期応力を与えたので、臨界電流やｎ値を高く維持させた高品質のコイルを保証することができる。
【００６１】
なお、本実施形態は、コイルを２０Ｋの液体窒素の中に浸漬冷却し、通電したところ臨界電流、ｎ値ともに好成績の実験結果が認められた。
【００６２】
図８は、本発明に係る超電導コイル装置の第７実施形態を説明するために用いた概念図である。なお、第１実施形態の構成部分と同一部分には同一符号を付す。
【００６３】
本発明に係る超電導コイル装置に適用する超電導線材は、第１実施形態と同様に、絶縁被覆を施工していないビスマス系、具体的には（ＢｉＰｂ）２Ｓｒ２Ｃａ２Ｃｕ３Ｏｙ（Ｂｉ２２２３）のＡｇシーステープで、幅３．８ｍｍ、厚み０．２５ｍｍである。
【００６４】
本実施形態に係る超電導コイル装置は、図８に示すように、周方向に沿って突き出し部２３，２３で区画した溝部２４を備えた筒状の巻枠１０に、固定板１１を設け、この固定板１１にＡｇシースＢｉ２２２３の超電導線材１２の端部を図９に示すように、半田部１３で固着させるとともに、超電導線材１２の中間部分が予め電極部１４に当接することを予想した位置に半田位置決め部１５を付し、矢印ＣＣＷで示した反時計方向に向って１０ＭＰａの引張応力で超電導線材１２を巻枠１０の溝部２４に沿って巻回させる。
【００６５】
超電導線材１２の半田位置決め部１５が電極部１４に当接すると、本実施形態は超電導線材１２に引張り張力を加えたまま電極部１４に半田部１３で固着させた後、固定板１１から電極部１４までの間の超電導線材１２を切断するとともに、固定板１１を取り除き、電極部１４に固着させた超電導線材１２に初期応力を与える。
【００６６】
巻回による引張り応力と半田部１３の固着力に基づく初期応力が与えられた超電導線材１２は、再び巻枠１０の溝部２４に沿って矢印ＣＣＷで示した反時計方向に向って巻回させてコイルを作製する。
【００６７】
このように、本実施形態は、巻枠１０の溝部２４に沿って巻回した超電導線材１２の電極部１４に固着させる際、引張り張力を加えながら予め適正な初期応力を与えたので、臨界電流やｎ値を高く維持させた高品質のコイルを保証することができる。
【００６８】
なお、本実施形態は、コイルを７７．３Ｋの液体窒素の中に浸漬冷却し、通電したところ臨界電流、ｎ値ともに好成績の実験結果が認められた。
【００６９】
図１０は、本発明に係る超電導コイル装置の第８実施形態を説明するために用いた概念図である。なお、第１実施形態および第５実施形態の構成部分と同一部分には同一符号を付す。
【００７０】
本発明に係る超電導コイル装置は、変圧器に適用するもので、鉄心２５に対峙する一次巻線２６ａ，２６ｂに、溝部２４を形成した巻枠１０の周方向に、矢印ＣＷで示した時計方向に向って巻回させ、第１実施形態と同様に、電極部１４に固着させる際、超電導線材１２に予め初期応力を与えたコイルを使用する一方、一次巻線２６ａ，２６ｂの中間部分に配置した二次巻線２７に、図５で示した第５実施形態の第１コイル１８ａと第２コイル１８ｂとを組み合せたコイルを使用したものである。なお、第１コイル１８ａおよび第２コイル１８ｂは、ともに巻枠１０に溝部２４が形成され、溝部２４に沿って超電導線材１２が巻回されている。また、一次巻線２６ａ，２６ｂに適用するコイルの超電導線材１２の巻回方向と二次巻線２７に適用するコイルの超電導線材１２の巻回方向とを同一の方向であっても、また互いに逆向きの方向のいずれであってもよい。また、他の構成は第１実施形態および第５実施形態と同一なので、その説明を省略する。
【００７１】
このように、本実施形態は、一次巻線２６ａ，２６ｂおよび二次巻線２７ともに、超電導線材１２に電極部１４を固着させる際、超電導線材１２に適正な初期応力を与えたのでｎ値等高い性能を保証した変圧器を実現することができる。
【００７２】
図１１は、本発明に係る超電導コイル装置の第９実施形態を説明するために用いた概念図である。なお、第１実施形態の構成部分と同一部分には同一符号を付す。
【００７３】
本発明に係る超電導コイル装置は、限流器や永久電流スイッチに適用するもので、巻枠１０に形成した溝部２４に沿って超電導線材１２を巻回させるとともに、その巻回手順を第１実施形態と同様に、電極部１４に超電導線材１２を固着させる際、超電導線材１２に予め適正な初期応力を与えて作製したコイルのうち、直径の異なる単位コイル２１ａ，２１ｂ，２１ｃ………を同心状に数個または数十個配置してユニットコイル２２に形成したものである。
【００７４】
このように、本実施形態は、電極部１４に固着させる超電導線材１２に予め適正な初期応力を与えてコイルに作製し、そのコイルを限流器等に組み込んだので、ｎ値等性能を高く維持させて限流器等の品質を保証することができる。
【００７５】
【発明の効果】
以上の説明のとおり、本発明に係る超電導コイル装置は、超電導線材を電極部に固着させ、巻枠の周方向に沿って巻回させてコイルを作製する際、電極部に固着させる超電導線材に、予め初期応力を与えて負荷を均一化させて局所的な線材の断線等を防止したので、臨界電流やｎ値を高く維持させた高品質のコイルを保証することができる。
【図面の簡単な説明】
【図１】本発明に係る超電導コイル装置の第１実施形態を説明するために用いた概念図で、（ａ）は巻枠に対し、超電導線材の仮りの巻回始期を説明するために用いた概念図、（ｂ）は巻枠に対し、超電導線材の仮りの巻回中間期を説明するために用いた概念図、（ｃ）は巻枠に対し、超電導線材の実際の巻回始期を説明するために用いた概念図。
【図２】本発明に係る超電導コイル装置の第２実施形態を説明するために用いた概念図。
【図３】本発明に係る超電導コイル装置の第３実施形態を説明するために用いた概念図。
【図４】本発明に係る超電導コイル装置の第４実施形態を説明するために用いた概念図。
【図５】本発明に係る超電導コイル装置の第５実施形態を説明するために用いた概念図で、（ａ）は巻枠に対し、超電導線材の仮りの巻回始期を説明するために用いた第１コイルの概念図、（ｂ）は巻枠に対し、超電導線材の仮りの巻回始期を説明するために用いた第２コイルの概念図、（ｃ）は第１コイルと第２コイルとを同心的に配置して組み合わせたことを説明するために用いた概念図。
【図６】本発明に係る超電導コイル装置の第６実施形態を説明するために用いた概念図。
【図７】パンケーキ状に作製した単位コイルを電極部の軸方向に沿って配置・組み合わせたユニットコイルを説明するために用いた概念図。
【図８】本発明に係る超電導コイル装置の第７実施形態を説明するために用いた概念図。
【図９】図８のＡ部拡大部分断面図。
【図１０】本発明に係る超電導コイル装置の第８実施形態を説明するために用いた概念図。
【図１１】本発明に係る超電導コイル装置の第９実施形態を説明するために用いた概念図。
【図１２】従来の超電導コイル装置を示す概念図。
【符号の説明】
１ 電極部
２ 超電導線材
３ 巻枠
１０ 巻枠
１１ 固定板
１２ 超電導線材
１２ａ 第１超電導線材
１２ｂ 第２超電導線材
１３ 半田部
１４ 電極部
１５ 半田位置決め部
１６ エポキシ接着剤
１７ａ，１７ｂ，１７ｃ 線材
１８ａ 第１コイル
１８ｂ 第２コイル
１９ 連結部
２０ 絶縁テープ
２１ 単位コイル
２２ ユニットコイル
２３ 突き出し部
２４ 溝部
２５ 鉄心
２６ａ，２６ｂ 一次巻線
２７ 二次巻線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a superconducting coil device having increased tensile strength when a tape-like superconducting wire is wound into a coil.
[0002]
[Prior art]
In general, the superconducting coil device is a metal superconducting wire or an oxide superconducting wire, and when the wire is wound in a coil shape, it is connected to a normal conducting metal such as a copper plate at the start and end of winding. A so-called electrode portion is provided. A current is supplied from the power source to the superconducting coil device through this electrode portion.
[0003]
This superconducting coil device is widely applied as a coil for static power devices such as transformers and current limiters, but the procedure shown in FIG.
[0004]
In the superconducting coil device, for example, a tape-like superconducting wire 2 is soldered to an electrode portion 1 made of copper plate, and then wound in a solenoid shape along the circumferential direction of the cylindrical winding frame 3 while applying tension to the superconducting wire 2. Turned to make a coil.
[0005]
[Problems to be solved by the invention]
The conventional superconducting coil device that employs the winding procedure of the superconducting wire 2 shown in FIG. 12 has some problems and disadvantages.
[0006]
The superconducting coil device winds the superconducting wire 2 along the circumferential direction of the winding frame 3 to produce the coil. There was an excess or deficiency in tension, such as little tension at the beginning or too much tension. For this reason, the coil may cause mechanical deterioration such as deformation or cracking as a result of long-term use.
[0007]
Also, if there is excess or deficiency of tension at the beginning of winding of the superconducting wire 2, the superconducting coil device has, for example, an indicator of critical current or n value (current / voltage rising slope, etc.) is lowered, resulting in performance degradation. It was also a cause.
[0008]
As described above, the conventional superconducting coil device has several problems, and it has been desired to realize a new coil that can maintain the quality guarantee for a long time even when used for many years.
[0009]
The present invention has been made based on such circumstances, and when producing a coil by winding a superconducting wire, soldering is applied to the electrode part while applying tension to the superconducting wire so that the superconducting wire is not insufficient. It is an object of the present invention to provide a superconducting coil device that uniformly applies tensile stress and maintains good quality for a long time even after many years of implementation.
[0010]
[Means for Solving the Problems]
  In order to achieve the above object, a superconducting coil device according to the present invention comprises a superconducting wire wound along the circumferential direction of a winding frame and an electrode fixed to the superconducting wire as described in claim 1. In the superconducting coil device comprising a portion, the superconducting wire isWhen fixing to the fixing plate provided on the winding frame with fixing means, and fixing to the electrode portion with fixing means, after fixing while applying tension, cut from the fixing plate to the electrode portion, and further The fixing plate is removed from the winding frame.
[0012]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.2As described above, the fixing means for fixing the superconducting wire to the electrode portion is solder.
[0013]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.3As described above, the fixing means for fixing the superconducting wire to the fixing plate is any one of solder and epoxy adhesive.
[0014]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.4As described above, the superconducting wire is obtained by fixing a plurality of superconducting wires at the solder portion and winding them along the circumferential direction of the winding frame.
[0015]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.5As described above, the superconducting wire is characterized in that no insulating coating is applied.
[0016]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.6As described above, the superconducting wire is formed by applying an insulating coating, peeling off a portion to be fixed to the electrode portion from the twisted wire of the insulating coating, and fixing the portion to the electrode portion as a round wire.
[0017]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.7As described above, when the superconducting wire is wound along the circumferential direction of the winding frame, it is formed in a pancake shape.
[0018]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.8As described above, when the superconducting wire is wound along the circumferential direction of the winding frame, the superconducting wire is formed into a pancake shape, and the pancake shape is arranged and combined in the axial direction to form a coil.
[0019]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.9In the superconducting coil device including the superconducting wire wound along the circumferential direction of the winding frame and the electrode portion fixed to the superconducting wire, the superconducting wire is provided on the winding frame. When fixing to the fixing plate with fixing means, and fixing to the electrode portion with fixing means, after fixing the electrode plate while applying tension, the superconducting wire from the fixing plate to the electrode portion is cut, and further the fixing plate The first coil formed by removing the wire from the winding frame and the other superconducting wire are fixed to another fixing plate provided on the other winding frame by fixing means and fixed to the other electrode portion by fixing means. When fixing, after fixing while applying tension, cut the other superconducting wire from the other fixing plate to the other electrode part, and further remove the other fixing plate from the other winding frame Second coil , It is obtained by connecting the electrode portion of the electrode portion and the second coil of the first coil by a connecting portion.
[0020]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.10As described above, the winding frame around which the superconducting wire is wound is provided with a groove section defined by a protruding portion provided along the circumferential direction.
[0021]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.11As described above, when the first coil and the second coil are both wound with the superconducting wire along the circumferential direction of the winding frame, either the clockwise direction or the counterclockwise direction is selected. It is what.
[0022]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.12As described in1Applying the described superconducting wire to the primary winding of the transformer, and claim9The superconducting wire described in 1 is applied to the secondary winding of the transformer.
[0023]
  In order to achieve the above object, a superconducting coil device according to the present invention is claimed.13As described in1A coil is produced by combining a plurality of superconducting wires described above with different diameters, and applied to either a current limiter or a permanent current switch.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a superconducting coil device according to the present invention will be described below with reference to the drawings and reference numerals attached to the drawings.
[0025]
FIG. 1 is a conceptual diagram used for explaining a first embodiment of a superconducting coil device according to the present invention. 1A is a conceptual diagram used for explaining the initial winding start of the superconducting wire with respect to the winding frame, and FIG. 1B is a temporary winding of the superconducting wire with respect to the winding frame. It is the conceptual diagram used in order to demonstrate the turn intermediate period, (c) is the conceptual diagram used in order to demonstrate the actual winding start period of a superconducting wire with respect to a winding frame.
[0026]
Further, the superconducting wire applied to the superconducting coil device according to the present invention is a bismuth system in which no insulation coating is applied, specifically (BiPb).2Sr2Ca2Cu3This is an Oy (Bi2223) Ag sheath tape having a width of 3.8 mm and a thickness of 0.25 mm.
[0027]
As shown in FIG. 1A, the superconducting coil device according to the present embodiment, as shown in FIG. 1A, first, a superconducting wire rod of Ag sheath Bi2223 on a copper plate fixing plate 11 provided on a cylindrical winding frame 10 is used. The end of 12 is fixed by the solder part 13, and the solder positioning part 15 is attached to the position where the intermediate part of the superconducting wire 12 is expected to contact the electrode part 14 in advance, and the clockwise direction indicated by the arrow CW is directed. The superconducting wire 12 is wound along the circumferential direction of the winding frame 10 with a tensile stress of 10 MPa.
[0028]
Next, when the solder positioning portion 15 of the superconducting wire 12 abuts on the electrode portion 14 as shown in FIG. 1B, in the present embodiment, the solder portion 13 is applied to the electrode portion 14 while the tension is applied to the superconducting wire 12. 1, the superconducting wire 12 between the fixing plate 11 and the electrode portion 14 is cut, and the fixing plate 11 is removed and fixed to the electrode portion 14 as shown in FIG. An initial stress is applied to 12.
[0029]
As shown in FIG. 1C, the superconducting wire 12 to which the initial stress based on the tension due to the winding and the fixing force of the solder part 13 is applied starts a substantial winding start period. A coil is produced by winding in the clockwise direction indicated by arrow CW.
[0030]
As described above, in the present embodiment, at the start of winding of the superconducting wire 12, after the initial stress is applied to the superconducting wire 12 in advance by welding the fixing plate 11 and the electrode portion 14 with the solder portion 13, before the electrode portion 14. Since the winding start time is substantially cut by cutting from the side, and uniform stress is applied to the winding start portion of the superconducting wire 12 with respect to the electrode portion 14 without locally disconnecting, the critical current is maintained even though it has been carried out for many years. Combined with keeping it high, it is possible to guarantee a high-quality coil whose n value is kept high.
[0031]
In this embodiment, when the coil was immersed and cooled in liquid nitrogen and energized, experimental results with good results were recognized for both the critical current and the n value.
[0032]
FIG. 2 is a conceptual diagram used for explaining a second embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment.
[0033]
The superconducting wire applied to the superconducting coil device according to the present invention is a bismuth system in which no insulation coating is applied, specifically Bi.2Sr2CaCu2It is an Ag sheath tape of Oy (Bi2212) and has a width of 3.8 mm and a thickness of 0.25 mm.
[0034]
In this embodiment, first, the end of the superconducting wire 12 of the Ag sheath Bi2212 is fixed to the cylindrical winding frame 10 by the epoxy adhesive 16 over about 2 cm, and the intermediate portion of the superconducting wire 12 is preliminarily formed in the electrode portion 14. A solder positioning portion 15 is attached at a position where it is expected to abut, and the superconducting wire 12 is wound along the circumferential direction of the winding frame 10 with a tensile stress of 5 MPa in the clockwise direction indicated by the arrow CW.
[0035]
Next, when the solder positioning portion 15 of the superconducting wire 12 is brought into contact with the electrode portion 14, in the present embodiment, the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13 while the tension is applied to the superconducting wire 12. The superconducting wire 12 is wound along the circumferential direction to produce a coil.
[0036]
As described above, in this embodiment, when the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13, the end portion of the superconducting wire 12 is fixed with the epoxy adhesive 16, and the electrode portion 14 of the superconducting wire 12 abuts. Since an appropriate initial stress is applied to the position in advance, it is possible to guarantee a high-quality coil that maintains a high critical current and n value.
[0037]
In this embodiment, when the coil was immersed and cooled in liquid nitrogen and energized, good experimental results were recognized for both the critical flow and the n value.
[0038]
FIG. 3 is a conceptual diagram used for explaining a third embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment.
[0039]
The superconducting wire applied to the superconducting coil device according to the present invention is an yttrium-based material having no insulation coating, specifically YBa.2Cu3An Oy (Y123) / XYZ hastelloy substrate tape having a width of 10 mm and a thickness of 0.1 mm.
[0040]
In the present embodiment, first, a first superconducting wire 12a and a second superconducting wire 12b of a hastelo substrate tape are overlapped on a fixing plate 11 made of copper plate provided on a cylindrical winding frame 10 and fixed by a solder part 13. At the same time, a solder positioning portion 15 is attached at a position where the intermediate portion of the first superconducting wire 12a is expected to contact the electrode portion 14 in advance, and the first superconductivity with a tensile stress of 1 MPa in the clockwise direction indicated by the arrow CW. The wire 12a and the second superconducting wire 12b are wound along the circumferential direction of the winding frame 10. The first superconducting wire 12a and the second superconducting wire 12b are fixed to each other by the solder portion 13.
[0041]
Next, when the solder positioning portion 15 of the first superconducting wire 12a comes into contact with the electrode portion 14, in the present embodiment, the first superconducting wire 12a and the second superconducting wire 12b, which are stacked in two layers, are fixed by the solder portion 13. The first superconducting wire 12a is fixed to the electrode portion 14 with the solder portion 13 while tension is applied thereto, and then the first superconducting wire 12a and the second superconducting wire 12b are wound along the circumferential direction of the winding frame 10, A coil is produced.
[0042]
As described above, in the present embodiment, when the first superconducting wire 12a and the second superconducting wire 12b fixed to each other by the solder part 13 are fixed to the electrode part 14 by the solder part 13, the two superposed first superconducting wires 12a are stacked. Since the respective end portions of the second superconducting wire 12b are fixed by the fixing plate 11, and appropriate initial stress is applied in advance to the positions where the electrode portions 14 of the first superconducting wire 12a and the second superconducting wire 12b abut. It is possible to guarantee a high-quality coil in which the critical current and n value are kept high. In the case of this embodiment, it is effective for a large current.
[0043]
FIG. 4 is a conceptual diagram used for explaining a fourth embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment.
[0044]
The superconducting wire applied to the superconducting coil device according to the present invention is formed by twisting and insulatingly coating three NbTi wires of CuNi / Cu matrix having a wire diameter of 0.1 mm.
[0045]
In this embodiment, first, the superconducting wire 12 is stripped of insulation coating over a length of several tens of centimeters from its end, and solder portions 13 are attached to the fixing plate 11 provided on the winding frame 10 as round wires 17a, 17b, and 17c. Secure with. Further, the round wire rods 17a, 17b, and 17c are provided with a solder positioning portion 15 at a position where the electrode portion 14 is expected to come into contact with the intermediate portion in advance, and a tensile stress of 1 MPa toward the counterclockwise direction indicated by the arrow CCW. Thus, it is wound along the circumferential direction of the winding frame 10.
[0046]
Next, when the solder positioning portion 15 of the round wire rods 17a, 17b, and 17c comes into contact with the electrode portion 14, in the present embodiment, the round wire rods 17a, 17b, and 17c are applied with the tensile tension applied to the round wire rods 17a, 17b, and 17c. Is fixed to the electrode part 14 with the solder part 13, and then the superconducting wire 12 is wound along the circumferential direction of the winding frame to produce a coil.
[0047]
As described above, in the present embodiment, among the superconducting wires 12 in which three wires are twisted together and insulated, the respective ends of the round wires 17a, 17b, and 17c are fixed to the fixing plate 11 with the solder portions 13, Since an appropriate initial stress is applied in advance to the positions where the electrode portions 14 of the wire rods 17a, 17b, and 17c come into contact with each other, it is possible to guarantee a high-quality coil that maintains a high critical current and n value.
[0048]
FIG. 5 is a conceptual diagram used for explaining a fifth embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment. 5A is a conceptual diagram of the first coil used for explaining the temporary winding start of the superconducting wire with respect to the winding frame, and FIG. 5B is a superconducting wire with respect to the winding frame. It is a conceptual diagram of the 2nd coil used in order to explain the temporary winding start period, and (c) is used for explaining that the first coil and the second coil are concentrically arranged and combined. It was a conceptual diagram.
[0049]
The superconducting coil device according to the present invention is configured by combining a first coil 18a having a diameter of about 20 cm and a second coil 18b having a diameter of about 21.4 cm.
[0050]
As shown in FIG. 5A, the first coil 18 a fixes the end portion of the superconducting wire 12 to the fixing plate 11 made of copper plate provided on the cylindrical winding frame 10 with the solder portion 13, and the superconducting wire 12. A solder positioning portion 15 is attached at a position where it is predicted that the intermediate portion of the intermediate portion is in contact with the electrode portion 14 in advance, and the superconducting wire 12 is moved in the circumferential direction of the winding frame 10 while applying tension in the counterclockwise direction indicated by the arrow CCW. Wind along.
[0051]
Next, when the solder positioning portion 15 of the superconducting wire 12 comes into contact with the electrode 14, the present embodiment is fixed to the electrode portion 14 with the solder portion 13 while applying tension to the superconducting wire 12, as in the first embodiment. Then, the superconducting wire 12 between the fixed plate 11 and the electrode portion 14 is cut, and the fixing plate 11 is removed, and an initial stress is applied to the superconducting wire 12 fixed to the electrode portion 14.
[0052]
The superconducting wire 12 to which the initial stress is applied is wound again in the counterclockwise direction indicated by the arrow CCW along the circumferential direction of the winding frame 10, and then the first coil 18a of the solenoid is produced.
[0053]
On the other hand, as shown in FIG. 5 (b), the second coil 18 b is formed by fixing the end portion of the superconducting wire 12 to the copper plate fixing plate 11 provided on the cylindrical winding frame 10 with the solder portion 13. Similar to the manufacturing procedure of the first coil 18a, when the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13, it is cut after applying an initial stress, and the cut superconducting wire 12 is clockwise in the direction indicated by the arrow CW. After winding in the direction, the second coil 18b of the solenoid is produced.
[0054]
The first coil 18a and the second coil 18b thus manufactured are arranged concentrically as shown in FIG. 5C, and the electrode portions 14 and 14 are connected by a connecting portion 19 such as a copper plate, for example. .
[0055]
In the present embodiment, when the superconducting coil device is manufactured by combining the first coil 18a and the second coil 18b, the superconducting wire 12 of the first coil 18a is wound around the winding frame 10 in the counterclockwise direction. At the same time, the superconducting wire 12 of the second coil 18b is wound around the winding frame 10 in the clockwise direction, and the electrodes 14 and 14 of the coils 18a and 18b are connected by the connecting portion 19, while the coils 18a and 18b are connected. When the superconducting wires 12, 12 were fixed to the electrode portions 14, 14, since appropriate initial stress was applied in advance to the ends of the superconducting wires 12, 12 while applying tension, the critical current and the n value were kept high. High quality coils can be guaranteed.
[0056]
FIG. 6 is a conceptual diagram used for explaining a sixth embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment.
[0057]
As in the first embodiment, the superconducting wire applied to the superconducting coil device according to the present invention is a bismuth system in which no insulation coating is applied, specifically (BiPb).2Sr2Ca2Cu3It is an AgMn sheath tape of Oy (Bi2223) and has a width of 3.8 mm and a thickness of 0.25 mm.
[0058]
As shown in FIG. 6, the superconducting coil device according to the present embodiment fixes the end portion of the superconducting wire 12 of the Ag sheath Bi2223 to the cylindrical winding frame 10 with the insulating tape 20, and the middle of the superconducting wire 12. A solder positioning portion 15 is attached to a position in anticipation that the portion is in contact with the electrode portion 14 in advance, and the superconducting wire 12 is moved in the circumferential direction of the reel 10 with a tensile stress of 10 MPa in the counterclockwise direction indicated by the arrow CCW. The superconducting wire 12 is fixed by the solder part 13 at the electrode part 14 and then wound in the counterclockwise direction indicated by the arrow CCW, so that a pancake-shaped unit coil 21 is produced. .
[0059]
As shown in FIG. 7, the unit coil 21 produced in a pancake shape is arranged and combined along the axial direction of the electrode portion 14 to produce one unit coil 22.
[0060]
As described above, in the present embodiment, when the single unit coil 22 is manufactured by arranging and combining the pancake-shaped unit coils 21 along the axial direction of the electrode portion 14, the superconducting wire 12 is electroded for each unit coil 21. When fixing to the portion 14, since an appropriate initial stress was applied in advance while applying a tensile tension, it is possible to guarantee a high-quality coil that maintains a high critical current and n value.
[0061]
In the present embodiment, when the coil was immersed and cooled in 20K liquid nitrogen and energized, both the critical current and the n value were found to have good experimental results.
[0062]
FIG. 8 is a conceptual diagram used for explaining a seventh embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment.
[0063]
As in the first embodiment, the superconducting wire applied to the superconducting coil device according to the present invention is a bismuth system in which no insulation coating is applied, specifically (BiPb).2Sr2Ca2Cu3This is an Oy (Bi2223) Ag sheath tape having a width of 3.8 mm and a thickness of 0.25 mm.
[0064]
As shown in FIG. 8, the superconducting coil device according to the present embodiment is provided with a fixing plate 11 on a cylindrical winding frame 10 provided with groove portions 24 partitioned by protruding portions 23 and 23 along the circumferential direction. As shown in FIG. 9, the end of the superconducting wire 12 of the Ag sheath Bi2223 is fixed to the fixing plate 11 with the solder portion 13, and the intermediate portion of the superconducting wire 12 is expected to contact the electrode portion 14 in advance. The solder positioning portion 15 is attached, and the superconducting wire 12 is wound along the groove portion 24 of the winding frame 10 with a tensile stress of 10 MPa in the counterclockwise direction indicated by the arrow CCW.
[0065]
When the solder positioning portion 15 of the superconducting wire 12 abuts on the electrode portion 14, in this embodiment, the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13 while a tensile tension is applied, and then the electrode portion from the fixed plate 11. The superconducting wire 12 up to 14 is cut, the fixing plate 11 is removed, and initial stress is applied to the superconducting wire 12 fixed to the electrode portion 14.
[0066]
The superconducting wire 12 to which the initial stress based on the tensile stress due to winding and the fixing force of the solder portion 13 is applied is again wound in the counterclockwise direction indicated by the arrow CCW along the groove portion 24 of the winding frame 10. A coil is produced.
[0067]
As described above, in this embodiment, when the superconducting wire 12 wound along the groove portion 24 of the winding frame 10 is fixed to the electrode portion 14, an appropriate initial stress is applied in advance while applying a tensile tension. In addition, it is possible to guarantee a high-quality coil with a high n value.
[0068]
In this embodiment, when the coil was immersed and cooled in 77.3 K of liquid nitrogen and energized, both the critical current and the n value showed good experimental results.
[0069]
FIG. 10 is a conceptual diagram used for explaining an eighth embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment and 5th Embodiment.
[0070]
The superconducting coil device according to the present invention is applied to a transformer, and is a clockwise direction indicated by an arrow CW in a circumferential direction of a winding frame 10 in which a groove portion 24 is formed in primary windings 26a and 26b facing an iron core 25. In the same manner as in the first embodiment, when the coil is fixed to the electrode part 14, a coil preliminarily applied with an initial stress is used for the superconducting wire 12, while being arranged in the middle part of the primary windings 26a and 26b. In the secondary winding 27, a coil in which the first coil 18a and the second coil 18b of the fifth embodiment shown in FIG. 5 are combined is used. The first coil 18 a and the second coil 18 b both have a groove 24 formed in the winding frame 10, and the superconducting wire 12 is wound along the groove 24. Moreover, even if the winding direction of the superconducting wire 12 of the coil applied to the primary windings 26a and 26b and the winding direction of the superconducting wire 12 of the coil applied to the secondary winding 27 are the same direction, and Any of the opposite directions may be used. Other configurations are the same as those in the first embodiment and the fifth embodiment, and thus description thereof is omitted.
[0071]
As described above, in the present embodiment, when the primary windings 26a and 26b and the secondary winding 27 are fixed to the superconducting wire 12 with the electrode portion 14 being applied to the superconducting wire 12, appropriate initial stress is applied to the superconducting wire 12. A transformer that guarantees high performance can be realized.
[0072]
FIG. 11 is a conceptual diagram used for explaining a ninth embodiment of the superconducting coil device according to the present invention. In addition, the same code | symbol is attached | subjected to the same part as the component of 1st Embodiment.
[0073]
The superconducting coil device according to the present invention is applied to a current limiter and a permanent current switch. The superconducting wire 12 is wound along the groove portion 24 formed in the winding frame 10, and the winding procedure is first executed. As in the embodiment, when the superconducting wire 12 is fixed to the electrode part 14, among the coils produced by applying appropriate initial stress to the superconducting wire 12 in advance, the unit coils 21a, 21b, 21c,. The unit coil 22 is formed by arranging several or several tens of them in a shape.
[0074]
As described above, in the present embodiment, the superconducting wire 12 to be fixed to the electrode portion 14 is preliminarily applied with a proper initial stress to be produced in a coil, and the coil is incorporated in a current limiting device or the like. It can be maintained and the quality of the current limiting device etc. can be guaranteed.
[0075]
【The invention's effect】
As described above, the superconducting coil device according to the present invention is a superconducting wire that is fixed to the electrode portion when the superconducting wire is fixed to the electrode portion and wound along the circumferential direction of the winding frame to produce a coil. Since the initial stress is applied in advance to make the load uniform and local wire breakage and the like are prevented, a high quality coil in which the critical current and the n value are kept high can be guaranteed.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram used for explaining a first embodiment of a superconducting coil device according to the present invention. FIG. 1 (a) is used to explain the initial winding start of a superconducting wire relative to a winding frame. (B) is a conceptual diagram used for explaining the temporary winding intermediate period of the superconducting wire with respect to the winding frame, (c) is an actual winding start period of the superconducting wire with respect to the winding frame. The conceptual diagram used in order to demonstrate.
FIG. 2 is a conceptual diagram used for explaining a second embodiment of the superconducting coil device according to the present invention.
FIG. 3 is a conceptual diagram used for explaining a third embodiment of the superconducting coil device according to the present invention.
FIG. 4 is a conceptual diagram used to explain a fourth embodiment of a superconducting coil device according to the present invention.
FIG. 5 is a conceptual diagram used for explaining a fifth embodiment of the superconducting coil device according to the present invention, and FIG. 5 (a) is used for explaining the initial winding start of the superconducting wire relative to the winding frame. (B) is a conceptual diagram of the second coil used for explaining the temporary winding start of the superconducting wire with respect to the winding frame, (c) is the first coil and the second coil. The conceptual diagram used in order to demonstrate having arrange | positioned and combined concentrically.
FIG. 6 is a conceptual diagram used for explaining a sixth embodiment of the superconducting coil device according to the present invention.
FIG. 7 is a conceptual diagram used for explaining a unit coil in which unit coils produced in a pancake shape are arranged and combined along the axial direction of an electrode portion.
FIG. 8 is a conceptual diagram used for explaining a seventh embodiment of the superconducting coil device according to the present invention;
9 is an enlarged partial cross-sectional view of a part A in FIG.
FIG. 10 is a conceptual diagram used to explain an eighth embodiment of a superconducting coil device according to the present invention.
FIG. 11 is a conceptual diagram used for explaining a ninth embodiment of the superconducting coil device according to the invention.
FIG. 12 is a conceptual diagram showing a conventional superconducting coil device.
[Explanation of symbols]
1 Electrode section
2 Superconducting wire
3 reel
10 reel
11 Fixing plate
12 Superconducting wire
12a First superconducting wire
12b Second superconducting wire
13 Solder part
14 Electrode section
15 Solder positioning part
16 Epoxy adhesive
17a, 17b, 17c Wire rod
18a first coil
18b Second coil
19 Connecting part
20 Insulating tape
21 Unit coil
22 Unit coil
23 Protruding part
24 groove
25 Iron core
26a, 26b Primary winding
27 Secondary winding

Claims (13)

巻枠の周方向に沿って巻回させた超電導線材と、この超電導線材に固着させた電極部とを備えた超電導コイル装置において、上記超電導線材は、上記巻枠に設けた固定板に固着手段で固着させるとともに、上記電極部に固着手段で固着させる際、張力を加えながら固着させた後、上記固定板から上記電極部までを切断し、さらに上記固定板を上記巻枠から取り除いたことを特徴とする超電導コイル装置。  In a superconducting coil device comprising a superconducting wire wound along the circumferential direction of a winding frame and an electrode portion fixed to the superconducting wire, the superconducting wire is fixed to a fixing plate provided on the winding frame. When fixing to the electrode part with fixing means, after fixing while applying tension, cutting from the fixing plate to the electrode part, and further removing the fixing plate from the reel A superconducting coil device. 電極部に超電導線材を固着させる固着手段は、半田であることを特徴とする請求項１に記載の超電導コイル装置。The superconducting coil device according to claim 1, wherein the fixing means for fixing the superconducting wire to the electrode portion is solder. 固定板に超電導線材を固着させる固着手段は、半田およびエポキシ接着剤のうち、いずれか一方であることを特徴とする請求項１に記載の超電導コイル装置。2. The superconducting coil device according to claim 1 , wherein the fixing means for fixing the superconducting wire to the fixing plate is one of solder and epoxy adhesive. 超電導線材は、複数本の超電導線材を半田部で固着させて巻枠の周方向に沿って巻回させたことを特徴とする請求項１に記載の超電導コイル装置。2. The superconducting coil device according to claim 1, wherein the superconducting wire is formed by fixing a plurality of superconducting wires with a solder portion and winding the superconducting wire along a circumferential direction of the winding frame. 超電導線材は、絶縁被覆を施工していないことを特徴とする請求項１に記載の超電導コイル装置。The superconducting coil device according to claim 1, wherein the superconducting wire has no insulation coating. 超電導線材は、絶縁被覆を施工するとともに、電極部に固着させる部分を絶縁被覆の撚り線から剥し、丸線として電極部に固着させたことを特徴とする請求項１に記載の超電導コイル装置。The superconducting coil device according to claim 1, wherein the superconducting wire is provided with an insulating coating, a portion to be fixed to the electrode portion is peeled off from the twisted wire of the insulating coating, and is fixed to the electrode portion as a round wire. 超電導線材は、巻枠の周方向に沿って巻回させる際、パンケーキ状に形成したことを特徴とする請求項１に記載の超電導コイル装置。The superconducting coil device according to claim 1, wherein the superconducting wire is formed in a pancake shape when being wound along the circumferential direction of the winding frame. 超電導線材は、巻枠の周方向に沿って巻回させる際、パンケーキ状に形成するとともに、パンケーキ状のものを軸方向に配置組み合わせてコイルとしたことを特徴とする請求項１に記載の超電導コイル装置。Superconducting wire, when the spirally wound along the circumferential direction of the bobbin, thereby forming a pancake, according to claim 1, characterized in that a coil in combination arranged things pancake axially Superconducting coil device. 巻枠の周方向に沿って巻回させた超電導線材と、この超電導線材に固着させた電極部とを備えた超電導コイル装置において、上記超電導線材を上記巻枠に設けた固定板に固着手段で固着させるとともに、上記電極部に固着手段で固着させる際、張力を加えながら固着させた後、上記固定板から上記電極部までの上記超電導線材を切断し、さらに上記固定板を上記巻枠から取り除いて形成した第１コイルと、上記別の超電導線材を上記別の巻枠に設けた別の固定板に固着手段で固着させるとともに、上記別の電極部に固着手段で固着させる際、張力を加えながら固着させた後、上記別の固定板から上記別の電極部までの上記別の超電導線材を切断し、さらに上記別の固定板を上記別の巻枠から取り除いて形成した第２コイルと、上記第１コイルの電極部と上記第２コイルの電極部とを連結部で接続させたことを特徴とする超電導コイル装置。  In a superconducting coil device comprising a superconducting wire wound along the circumferential direction of a winding frame and an electrode portion fixed to the superconducting wire, the superconducting wire is fixed to a fixing plate provided on the winding frame by means of fixing. When fixing to the electrode part with fixing means, after fixing while applying tension, the superconducting wire from the fixing plate to the electrode part is cut, and the fixing plate is further removed from the winding frame The first coil formed and the other superconducting wire are fixed to another fixing plate provided on the other winding frame by fixing means, and tension is applied when fixing to the other electrode portion by the fixing means. The second coil formed by cutting the other superconducting wire from the other fixing plate to the other electrode portion, and further removing the other fixing plate from the other winding frame; The first coil Superconducting coil device, characterized in that the electrode portion of the electrode portion and the second coil were connected by a connecting portion. 超電導線材を巻回させる巻枠は、周方向に沿って設けた突き出し部で区画した溝部を備えたことを特徴とする請求項１または９に記載の超電導コイル装置。The superconducting coil device according to claim 1 or 9 , wherein the winding frame around which the superconducting wire is wound includes a groove section defined by a protruding portion provided along the circumferential direction. 第１コイルおよび第２コイルは、ともに超電導線材を巻枠の周方向に沿って巻回させる際、時計方向および反時計方向のうち、いずれか一方を選択したことを特徴とする請求項９に記載の超電導コイル装置。First and second coils are both time of wound along the superconducting wire in the circumferential direction of the bobbin, of the clockwise and counterclockwise directions, to claim 9, characterized in that selects either The superconducting coil device described. 請求項１に記載の超電導線材を変圧器の一次巻線に適用するとともに、請求項９に記載の超電導線材を変圧器の二次巻線に適用したことを特徴とする超電導コイル装置。Together applied to the primary winding of the transformer superconducting wire according to claim 1, the superconducting coil device, characterized in that the application of the superconducting wire according to the secondary winding of the transformer to claim 9. 請求項１に記載の超電導線材を直径の異なる複数個組み合わせてコイルを作製し、限流器および永久電流スイッチのいずれかに適用したことを特徴とする超電導コイル装置。A superconducting coil device, wherein a coil is produced by combining a plurality of superconducting wires according to claim 1 having different diameters and applied to either a current limiter or a permanent current switch.
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